Simultaneous Vibration Isolation and Damping Control Via High Authority Smart Structures

摘要

The goal of this proposed research is to investigate a new class of high authority smart structures to isolate vibration (isolate main structure from disturbance source) and control vibration (of the sub-structure with disturbance source) simultaneously in a multi-mode environment. The idea is to develop novel multi-loop piezoelectric networks and control schemes for multi- frequency, and varying-frequency disturbance absorptions and isolations. During this research period, the PI and his students have achieved the following: (a) Developed active-passive piezoelectric network systems and controller for vibration isolation/absorption of excitations with varying frequency; (b) Developed a multi-loop active-passive piezoelectric network isolator/absorber for multiple varying frequency disturbance rejections; (c) Performed single actuator experimental investigation and parametric study; and (d) Explored multiple actuator systems on complex structures. The analytical and experimental results have demonstrated that the proposed systems can outperform the current approaches and effectively achieve significant vibration absorption and isolation.